Fat 911 T4 Cooling .. datalogger results

[Sandeep]

I'm using the pulley that came in the FAT kit, along with the pulley that comes with the 11 blade fan. How do I measure what the pulley diameters are ? I mean .. do I measure the diameter of the surface that the belt actually contacts on both pulleys ? I'm thinking so but just need clarification.

The AAT is also about 10deg C so this might explain the cool temps, just wait till we hit 35C with humidity in the summer Its getting cooler here by the day so the temps might seem fine ... just wish it was still summer ... I got my datalogger project completed about 6 months too soon

I'm using a stock 72 trans right now but am converting to a 914/01 5 speed this winter so the engine/trans combo will be stock for a 914.

I don't have any (big) hills nearby that I can drive hard up, and when I drive hard on the local roads, I reach the speed limit quite quickly.

Sandeep

[Wally]

Hi Sandeep,
AFAIK, the pulley diameter is measured on the outside edge, so just the biggest diameter of the wheel.
Mine is 145mm.

In my limited experience since the cyl. head temp measurement device is on, outside temps have hardly any effect on cyl. head temps.
Outside temp (environmental temp) does make a dramatic difference on oil temps, but not to head temps.
Can't logically explain it, but thats it.

Regards,
Walter